The lobster is an example of an arthropod. Look at the picture of the lobster. Which letter clearly shows that arthropods have a body that is divided into segments?

Jeanne saw a tiny creature. it had six legs and a hard outer covering. it also had one eye on each side of its head.

Jeanne claimed this was an insect and not a spider. Which evidence below supports her claim?

• The creature had a head

• The creature had six legs

• The creature had two eyes

• The creature had an outer covering

Answer explanation

The creature had six legs, which is a defining characteristic of insects. Insects typically have three pairs of legs, while spiders have eight legs. This evidence supports Jeanne's claim that it is an insect.

Many animals live in Florida's coastal waters. Pictured is one of those animals.

This animal is not an arthropod. Still, it shares one characteristic with arthropods.

Which characteristic does it share with an arthropod?

• It has no backbone

• It lives in the ocean

• It does not have any limbs (legs, arms)

• Its outer shell splits in two

Answer explanation

The correct choice is 'It has no backbone' because both this animal and arthropods are invertebrates, meaning they lack a backbone. The other options do not accurately reflect a shared characteristic.

Ms. Li owns a flower shop. She finds a strange-looking bug in the flowers. She knows the bug is an insect and not a spider because​ (a)  

• the bug has 3 main body parts

• the bug has a hard covering over its body

• the bug has jointed limbs that it uses to crawl

• the bug has a body that is segmented

Answer explanation

Insects are characterized by having three main body parts: the head, thorax, and abdomen. This distinguishes them from spiders, which have two main body parts. Therefore, the bug is identified as an insect.

Dewan's class is making a list of invertebrates. Dewan adds an animal to the list that is not an arthropod. Which of the following animals does Dewan add to the invertebrate list?

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Tags

NGSS.MS-LS4-2

A tick is an arthropod. A turtle is a reptile.

What do a tick and a turtle have in common?

• size

• backbone

• lungs

• hard covering

Answer explanation

Both ticks and turtles have a hard covering. Ticks have a tough exoskeleton, while turtles have a hard shell, which provides protection. This is the commonality between the two, unlike size, backbone, or lungs.

Tags

NGSS.MS-LS4-2

People confuse insects and spiders. What is one main difference between insects and spiders?

• Insects have 6 legs, and spiders have 8 legs.

• Insects are arthropods, but spiders are not arthropods.

• Insects have more legs than spiders do.

• Insects do not have backbones, but spiders do have backbones

Answer explanation

The main difference is that insects have 6 legs while spiders have 8 legs. This distinction is a key characteristic that separates these two groups of arthropods.

Tags

NGSS.MS-LS4-2

Students in Ann's class make a table to describe their pets.

Students write yes or no to tell whether the pet has each characteristic.

According to the table, whose pet is a reptile?​​ (a)  

• Ann's

• Ahmad's

• Miha's

• Keith's

Answer explanation

According to the table, Ann's pet is identified as a reptile, as indicated by a 'yes' under the reptile characteristic. The other students' pets do not have this classification.

Xaden classifies a fern plant, a rose bush, moss, and an evergreen tree.

Which 2 plants will Xaden classify as nonflowering plants that reproduce through spores.

• Fern and Rose Bush

• Fern and Moss

• Moss an Evergreen

• Rose Bush and Evergreen Tree

Answer explanation

Fern and moss are nonflowering plants that reproduce through spores. The rose bush and evergreen tree are flowering plants, making them incorrect choices.

Dain is making a poster about flamingos. tortoises, and frogs.

What is one way that all of these animals are alike?

• They lay eggs.

• They have feathers.

• They use gills for breathing.

• They have scales on their skin.

Answer explanation

All three animals—flamingos, tortoises, and frogs—are alike because they lay eggs. This is a common reproductive trait among many species, including birds, reptiles, and amphibians.